1121781701800 has 96 divisors (see below), whose sum is σ = 2755621620000. Its totient is φ = 423515554560.

The previous prime is 1121781701791. The next prime is 1121781701813. The reversal of 1121781701800 is 81071871211.

It is a self number, because there is not a number n which added to its sum of digits gives 1121781701800.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 473491 + ... + 1570909.

It is an arithmetic number, because the mean of its divisors is an integer number (28704391875).

Almost surely, 2^{1121781701800} is an apocalyptic number.

1121781701800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121781701800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1377810810000).

1121781701800 is an abundant number, since it is smaller than the sum of its proper divisors (1633839918200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1121781701800 is a wasteful number, since it uses less digits than its factorization.

1121781701800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097723 (or 1097714 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 37.

The spelling of 1121781701800 in words is "one trillion, one hundred twenty-one billion, seven hundred eighty-one million, seven hundred one thousand, eight hundred".